@ghdprentice Has the best approach. Size them up on the phone. See what they know about HIFI. On the other hand, they may know HIFI well and are tweakers. In that case they will probably want to check out your whole system at a later date.
On the serous side, if they pass the phone interview, I’d would not worry. Let them in the house. I’d be warm and welcoming. Selling speakers for local pick up reduces number of potential buyers. Even more so if you’re looking for ratings. If you’re spooked about any of this, just have the The Music Room sell it on consignment and be done with it.